The three interior angles of angle JKL measure 45ֲ°, 45ֲ°, and 90ֲ°. The three interior angles of angle PQR measure 45ֲ°, 45ֲ°, and 90ֲ°. The side JK of JKL measures 4 cm. Based on the given information, which of the following must be a true statement?